12561010680 has 64 divisors (see below), whose sum is σ = 38048924160. Its totient is φ = 3317079168.

The previous prime is 12561010663. The next prime is 12561010681. The reversal of 12561010680 is 8601016521.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12561010681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 495772 + ... + 520491.

It is an arithmetic number, because the mean of its divisors is an integer number (594514440).

Almost surely, 2^12561010680 is an apocalyptic number.

12561010680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12561010680 is an abundant number, since it is smaller than the sum of its proper divisors (25487913480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12561010680 is a wasteful number, since it uses less digits than its factorization.

12561010680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016380 (or 1016376 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 30.

The spelling of 12561010680 in words is "twelve billion, five hundred sixty-one million, ten thousand, six hundred eighty".